Belt-supporting-pulley system



W. J. ARMSTRONG.

BELT SUPPORTING PULLEY SYSTEM.

APPLICATION FILED APR. I9. i916.

Patented Mar. 15, 1921.

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PATENT OFFICE.;

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TUBING COBPANY, QF COLUIBUS, OHIO,

A. CORPORATION l' OHIO.

BELT-SUPPORTING-PULLEY lIYS'llEI.

lpecication of Letters Patent. Patented Mala-15, 1921.

Application ilegd April 19, 1918.. ASerial lo. 92,259.

To all whom 'it mary y Be it known that I,.Wimrnn J. ABM- s'rnoNG, a citizen of the United' States, re-

siding at Columbus, in the county'of Franklin and State of Ohio, have invented certain `vthe idler pulley systems whichare used for a minimum, all of the rollin supportin conveyer belting of rubber or other flexi le material, the systems being so arranged as to provide between the terminals ofthe conveyer a trough-shaped carrier for the material that is being transported.

The object of the invention is to provide for a wide belt a support of such nature that the belt will not only be supported uniforml from edge to edge, but 1n Such way as to ave numerous lines, longitudinally of support. The rotating devices are of such character and of such dimensions and are so arranged that the diiferences between the lineal speed of the belt and that of the peripheries of the pulleys will be reduced to parts being short axially, and being duphcates of each other.

Figure 1 is a view of a belt and one of the sets of supporting devices, the belt and one half of said set of devices being shown in section.

Fig. 2 is a side view of part of the conve er.

n the drawings a part of a framework or base structure is shown at Ff Above this travels the belt D, longitudinally.

Upon the base are fastened four bracket stands A, A', B, B. Upon these are supported five rolls or pulleys which are relatively short axially and all of the same diameter and similar in other dimensions. The central pulley is indicated by C, the outermost pulleys by C yand .the intermediate ones by C.

Heretofore belt supports of this sub-class have been vprovided with three pulleys. The length of the pulleys is limite for expensive wear of the rubber occurs if this length is so great as to make a large differential in the speeds of the diierent parts.

I shorten the pulleys, relatively, although they are all interchangeable and of the same dimensions and conformation. The result 1s that a wide belt can be used and it can be furmshedwith an elongated support, the chords of which are so short that the belt is practlcally supported uniformly throughout lts entire cross sectional curve.

Each of the stand brackets A, A has an upright part 1, a horizontally arranged short y tubular .socket 2 extending inward and an upward inclined tube socket 3 extendin out` ward, wlth a 'central axially aperturedg part 3. The horizontal tube socket is shouldered at 5 and the inclined socket is shouldered at 6. The parts 1, 2, 3, 3 of the bracket are all cast lntegrally together.

Wlth these central or inner stand brackets are combined two peculiarly sha ed brackets B and B. Each of these is ormed with an upright 7, a short downward inclined tube socket 8 extending inward, an upward inclined socket 9 extending outward, each of the sockets 8 and 9 being shouldered as at 11 and 12. The stand 7, the tubular sockets 8 and 9 and the central connectin part 9 are all cast integral. The angle of t e socket 8 to the horizon is the same as the angle of the socket 3 on the adjacent inner bracket. The angle of inclination to the horizon of the socket 9 corresponds to the curve or desired inclination of the neighboring part of the belt. The brackets A, A,.B, B are cast with pedestals which are secured by bolts 13 to the frame or base. e E indicates a tubular shaft having one end supported in each of the stand brackets A, A. It is fitted at the ends in the horizontal sockets 2, being brought to proper position by the shoulders 5; and' it is rmly locked by set screws 4f. E indicates an adtcent inclined tubular shaft section, and

2 an upper and outer section; there being one of the shaft sections E and a shaft secv CIT s stem is provided by the hollow shafts E,

E2, communication from each to the next being furnished in the axlally apertured central arts 3 and 9- of the stand brackets. Each o the tubular shafts is perforated as at l5, 15.to permit sufficient lubricant to pass from the interior of the shafts to the bearing surfaces of the pulleys. The lubricant is supplied from cups 13 one at each end of the lubricating duct. nular base ring 132 which fits tightly the outer end of the shaft and is locked thereon by a set screw 14, thisring serving as a spacing collar for abutting against the end of the pulley hub and locking the pulley in lace. p When the parts of the system are assembled they are all held rigidly together except that the pulle s are loose for free rotation. By inclining t e sockets 8 to the same angles as those of the sockets 3, although each of' these sockets is solid with its bracket, the brackets of the entire set are firmly braced and the shaft axes are held correctly in the same transverse plane. The apertures inthe pedestals of the brackets are preferably in the form of short slots so that there can be adjustment for a small fraction of an inch, if necessary, in order to avoid strain- .ing of the shafts or binding of the pulleys when the brackets are bolted firmly to the base.

What I claim is: 1. A belt supporting pulley mechanism having two inner stands or brackets each provided with an upright, an inner horizontal socket and an outer inclined socket all cast integral, outer stands or brackets each having an upri ht, an inner socket inclined downward at t e angle of the outer socket of an inner bracket and having an outer socket situated at a greater angle of inclination than its inner socket, 'the said two sockets and the upright of each outer bracket being all cast integral, a horizontal tubular shaft disposed in the two horizontal sockets of the inner brackets. two intermediate inclined hollow shafts 'each fitted in the inach cup has an anclined outer socket of an inner bracket and yin the inner -inclined socket of an outer bracket, two outermost shafts each supported at its inner end in the outer socket of an outer bracket, a central pulley, two intermediatepulleys and two outer pulleys, re-

socket 9 and an axial aperture, hollow shafts E2 respectively supported in the sockets 9 at relatively greater angles to the horizon than inclined sockets 8, inner-brackets A, A each having a horizontal socket 2 and an inclined socket 3, shaft sections E inclined at relatively less angles than shafts E2 and each fitted in a air of the said sockets 3 and 8, a central ho'rlzontal shaft section fitted in the horizontal sockets 3, a series of 'ulleys comprising a horizontal pulley on shaft E two intermediate pulle s C', C, on shafts 1 E and inclined at t4 e relativel less an les and outermost pulleys C2, on sha ts greater angles.

3. In av supporting mechanism for al troughed conveyer belt, the -combination of a transverse supporting base, a central transverse horizontal shaft, brackets securing said shaft to said supportin base, a series of a plurality 'of relatlvely s o rt shafts extending laterally in each direction from the central' shaft, the shafts of each series being straightl and increasingly inclined to the central shaft whereby curvature of the belt, all the shafts being in the same transverse vertical plane, supplemental brackets at the sides of those aforesa1d secured to and extending upward from the base and each bracket rigidly connected to the adjacent ends'of two of said shafts.

I In testimon whereof, I affix my signature, 1n presence o two witnesses. y

WALTER J. ARMSTRONG. Witnesses:

C. H. ANTHONY, C. R. Hmm.

they approximate the 2, E2, inclined at the relatively 

